PDF Creation using to_pff_pi not working

[eluser]Unknown[/eluser]
Hi,I am using to_pdf_pi for generating pdf.Its not working.In some browsers its leading to blank page and in some it shows an error like this " Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 16 bytes) in /var/www/mysteryShopper/system/plugins/dompdf/include/frame.cls.php on line 174"
Can anyone help me plz

[eluser]flaky[/eluser]
it looks like your php setup needs more memory, increase memory size in your php.ini file
example

Code:

memory_limit: 8M

change to

Code:

memory_limit: 64M